#include <stdio.h>


int sum(int show,int flast)
{
    int sum = 0;
    int i = 0;
    for(i = show;i<=flast;i++)
    {
        sum+=i;
    }
    return sum;
}

int main()
{
    printf("go\n");

    int show = 1;
    int flast = 10;
    int all = sum(show,flast);
    printf("out:%d\n",all);
    return 0;
}
